release/scripts/tar.sh

   1 #!/bin/sh -p
   2 #
   3 # Simple replacement for tar(1), using cpio(1).
   4 #
   5 # Copyright (c) 1996 Joerg Wunsch
   6 # All rights reserved.
   7 #
   8 # Redistribution and use in source and binary forms, with or without
   9 # modification, are permitted provided that the following conditions
  10 # are met:
  11 # 1. Redistributions of source code must retain the above copyright
  12 #    notice, this list of conditions and the following disclaimer.
  13 # 2. Redistributions in binary form must reproduce the above copyright
  14 #    notice, this list of conditions and the following disclaimer in the
  15 #    documentation and/or other materials provided with the distribution.
  16 #
  17 # THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
  18 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 # IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 #
  28 # $FreeBSD$
  29 #
  30
  31 #
  32 # For use on the fixit floppy.  External programs required:
  33 # cpio(1), find(1), test(1)
  34 #
  35
  36
  37 archive=${TAPE:-/dev/rsa0}
  38 blocksize="20"
  39 device=""
  40 mode="none"
  41 verbose=""
  42
  43 usage()
  44 {
  45         echo "usage: tar -{c|t|x} [-v] [-b blocksize] [-f archive] [files...]" 1>&2
  46         exit 64         # EX_USAGE
  47 }
  48
  49 #
  50 # Prepend a hyphen to the first arg if necessary, so the traditional form
  51 # ``tar xvf /dev/foobar'' will work, too.  More kludgy legacy forms are not
  52 # supported however.
  53 #
  54
  55 if [ $# -lt 1 ] ; then
  56         usage
  57 fi
  58
  59 case "$1" in
  60         -*)     break
  61                 ;;
  62         *)      tmp="$1"
  63                 shift
  64                 set -- -$tmp "$@"
  65                 ;;
  66 esac
  67
  68 while getopts "ctxvb:f:" option
  69 do
  70         case $option in
  71                 [ctx])
  72                         if [ $mode = "none" ] ; then
  73                                 mode=$option
  74                         else
  75                                 usage
  76                         fi
  77                         ;;
  78                 v)
  79                         verbose="-v"
  80                         ;;
  81                 b)
  82                         blocksize="${OPTARG}"
  83                         ;;
  84                 f)
  85                         archive="${OPTARG## }"
  86                         ;;
  87                 *)
  88                         usage
  89                         ;;
  90         esac
  91 done
  92
  93 shift $(($OPTIND - 1))
  94
  95 if [ "X${archive}" != "X-" ] ; then
  96         device="-F ${archive}"
  97 # else: use stdin or stdout, which is the default for cpio
  98 fi
  99
 100 case $mode in
 101         none)
 102                 usage
 103                 ;;
 104         t)
 105                 exec cpio -it $verbose $device --block-size="$blocksize" "$@"
 106                 ;;
 107         x)
 108                 exec cpio -idmu $verbose $device --block-size="$blocksize" "$@"
 109                 ;;
 110         c)
 111                 if [ $# -eq 0 ] ; then
 112                         # use current dir -- slightly bogus
 113                         set -- "."
 114                 fi
 115                 find "$@" -print |\
 116                     cpio -o -H ustar $verbose $device --block-size="$blocksize"
 117                 exit $?
 118                 ;;
 119 esac